Filter.



S. BROWNE.

FILTER.

APPLIOATIO! FILED SEPT. 18. 1908.

Patented Nov. 2,1909.

. V 2 aunts-sum 2;

6. 5' h v l Witnesses mama/4? RALPH S. BROWNE. OF ALAMEDA, CALIFORNIA.

FILTER.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed September 16, 1908. Serial No. 453,266.

To all 2131mm it may concern.-

Be it known that I, Rama! S. Bnowxn, a citizen of the I'nited States. residing at Alameda. in the county of Alameda .and S ate of California. have invented a new and useful Filter, of which the following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to filters used for the purpose of the purification of liquids, and its especial object is the purification oiliquids from very fine. slimes such as are treated in the cyanidation of gold and silver ores.

An object of the invention is to produce a filter which will be as nearly continuousin operation as possible, and which will require no personal supervision, all the operations being carried out by the mere operation of the machine.

In the drawings, in which the/same numeral of reference is applied to the same portion throughout, Figure 1 is a plan view of the machine, Fig. 2 is a side elevation of the same, the only frame shown being the supporting posts, Fig. 3 is a vertical sectional view of the center bearing, and Fig.4 is a vertical sectional view of one of the filter ans.

1n the drawing the numeral 1 is applied to the Hour which may he made of any suitable material. 21.1 opening-2 therein being provided for the discharge of the slimcs after they have been treated on the filter. Rising from the floor are six posts 3, one for each filter pan 4, and. a large center post 5 which supports the center bearing 6. Each of the posts 3 is provided with a cap bear-' ing for the hollow shafts t of the filter pans. The filter pans are frames having the inclined bottom 5 over which is secured the filtering top 9, cleats being placed around the entire outer edge of each pan. The inner side of the pan is secured permanently to the hollow shaft 7 and the outer edge of the pan is provided with two rollers 1.1. The hollow shafts all pass into the center hearing 12 which is secured on the top of the post 5, stutling boxes being used to make a tight joint at the junction of said pipes and the center hearing.

The center bearing 12 is provided with an upper and a lower com mrtment, the upper being connected with an air pressure supply by means of the pipe 13 and the lower is connected with a suction pump by means of the pipe 14. Each compartment of the center bearing is closed by means of a plate 15 on the upper of which the journal box 19 for the revoluble pipe II is secured. The pipes,

or hollow shafts, which are secured to the inner edges of the filter pans are each provided with a conical head 16 which has a port on one side. the head being threaded on the endof the pipe. This conical head a seat in the center bearing which has an opening into each of'the compartments of the center bearing, the packing in front; of the gland 1T acting to hold the cone 16 so closely into contactwith the seat as to make a tight joint. at all times.

The journal box 19 supports the pipe 27 which in turn supports the arms 20, 21, 22 and 23 cables 24 being secured to the center pipe to give greater strength to the construction. The arms and 21 support the track 25 which has the downwardly inclined cam 26 at its front end, the revolution of the revoluble parts taking place in the direction indicated by the arrow. The arms 20 and 21 are hollow and are for the purpose of feed-- ing the pulp and wash water to the tops of the filter bids. The arm 21 is connected with the. hopper 27 in which the slime solution is fed. The arm 20 is connected with the. hopper 28 into which the Wash water is fed.

The arms which are connected with the track have the downwardly extending portions :25) and 30 which are attached to the scraper 3t. a horizontal portion 32 connected in the bar 30 with one end of the scraper ill.

The arms 22 and 23 have. the track 33 secured to them. said track having the up- I wardly (attending cam 34 at the. front end. It will be understood that additional strength may be given all the arms by adding such bracing as may be found necessary and desirable.

The tiller pans are balanced so that they will turn down at the ends marked 11' as gently as may be found necessary. and it will be noted that there may be such number of the tiller pans as may be deemed necessary to provide for handling the desired amount of solution.

The operation of the device is as follows: The chain is connected with any suitable source of power and is turned slowly, the motion being as-indicated by the arrow in Fig. 1. the slime solution is then fed in the hopper 27 and is allowed to run on the filter h. 1"... Br w-BB tit) pans

through the arm 21, only enough,

water and slime being run iii to till the pan carried by the upply pipes to successively in the titne it takes the arm to pass over it. j 'ater is rttn into the hopper 2F and onto the pan through the arm '2. and during the time the arms :20 and it are pas ing over the adapted to debt cr all the siudge at one place.

pans the valve eonc lt' is turned so that it is I connected with the lower chantbcr of the center hearing. The rotation being: coir tinned the catu 21" picks up the lilter pan.

the rollers passing up and on the traclt' 25. F cloth when tn one position and to deliver a when the pan is held perfectly level. The weighted end of the pan drops down as soon as the track 25 passes out from under the last roller. leaving the pan as shown at the upper portion of Fig. I. when the track 33 moves up to the rollers on the outer edge of the pan. and since this traelt has an tipwal'dly extending cam and since the track is above, the horizontal plane of the rollers the pan is pushed over so that it is upside down, as shown at the right of Fig. l, in which position the valve cone 16 is in ctntnection with the upper chamber of the center hearing, see

the relative position of tlte two valve cones in Fig. 3. where it receives air under pressure sutlicient to cause the calte of slime to fall oh the tiller pan, tlte scraper ill pushing the mass which drops otf the pan through the hole 2 in the bottom of the floor 1. the rim 38 prevcntin; tlte slime from being pushed oil the lloor. except at the Sitltl hole.

It is to be noted that the movenn-nt. of the arms itt their travel around the several pans is so slow that cotnparatively little power is 1 required to operate the tiller. and that it does not require attention on the part of mill tender at all. any more than to see that it continues to operate.

Having thus described tny invention what I claim as new and desire to secure b la-t' let's latent of the United States isas follows:

I. 'In a lilter. the ('ttlllltlltttliut: of a litter bed. a pipe leading from itl l tiller bed and with which said bed is revoln le. means whereby a reduced air [)l't:+illt'l may be pro ccssivcly fiVcrta lt of the-filter beds, means right each tilter prior to its charging, means carried by the rcvolnble standard to invert each filter bed successively. and a scraper -t. in a lilter. a sorics of circularly placed hltcrs. a hollow shaft spportmg each filter. a valve at tllt end of said shaft and adapted to produce a pa rttal vacuutn under the filter pressure of air under the litter cloth when itt the opposite ltlhltlull. a traveling pulp and wash water feed. a revohtble track adapted -a pulp and wash water feed. a revoluble track adapted to contact with projectionson each filter itt Stlct'Pssiull to hold them upright, a second revolublc track adapted to contact with projections on each tilter to invert them in succession. and means to drive the two tracks.

(3. lll a tiller. a series of circularly placed liltt-t' a hollow shaft supporting each filter, a \'al\e at the end of the shaft and ada ted to produce a partial vacuum under the lter cloth during one stage and to deliver a ptg-ssure of an under the samc at another stage,

'a pulp and wash water feed, a revoluhle track supported near the outer edge of tach duced itt said pipe when in one lltr lttulh means whereby an increased air pressure may be produced in said pipe when in the opposite position. atnl means to turn said pipe and tiller bed from one po ition to the other and vice versa.

:2. in a lilter. a series of circularly placed revolnble tillers. means to invert rzu'lt liltcr tracks.

bed successively, tneans to supply a nllltinlt lillt'l' and adapted to contact with projections on ea h lill r'tt) hold the same npt tght. a econd rcvoluldc track adapted to contact; with the tillers in succession to invert them, and mean;- to operate the movable tracks.

7. lo a tiller. the combination of a series of t-t-tolubltlitters. a hollow shaft supportin; each tiller. :1 tnovable track adapted to hold each liltcr right side up by contacting with projections on each tiller. a second lnovable ltu 'li in a higher plane and following the lirsl track and adapted to invert the filto be liltered to the beds. means to supply a wash Solution to the beds, and :t scraper adapted to tltllYtl all the ltnlfltlltllllllttl front the bed. at one place.

It. in a tiller. a series of circularly placed tillers. a rt-vtdnbltstandard carr nup ply pipes for solution t be lilt--l't"l and wash water. aid Itllltr adapted to pa. sutters in succession. and means to drive the ln tcstinton whereof I have set my hand thi ll day of September A. D. 1908, in the. presence of the two subscribed witnessesv 

